Eh boleh je normal! Setiap pregnancy kan berlainan, ada yang rahim grow faster, ada yang slower, depending on uterus shape, body type, semua lah. Aku pun notice dengan anak pertama dan kedua aku, timing dan size agak berbeza even though healthy semua. Your doctor would've mentioned if anything's off during scan, so I think you're fine, but if you're worried better check with your gynae pun boleh just for peace of mind!